Board Thread:Pokémon Help/@comment-31398341-20171026040947/@comment-31398341-20180322143901

Yeah Ash-Greninja definitely deserves higher rank. Priority, power, speed and STAB combination makes it a potent fast special attacker. Due to its STAB combination and power, it has the ability to force out the opposing Pokemon so that it can take advantage with Spikes. Unlike other revenge killers, Ash-Greninja actually has a high damage output and has priority as well. Waterium Z set also can break through some of its conventional checks. The fact that three of its counters (Toxapex, Chansey, Ferrothorn) are often used and its frailty hurts, but it can easily be remedied by the rest of the team (with Mega Scizor, Magnezone, etc.). In comparison, it is actually even better than most of the B+ ranks. It is much more than a niche Pokemon, and is always a solid choice.

Ash-Greninja : B >>> A-